Pinklestia
Well worn.
- Joined
- Sep 23, 2015
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It hasn't been removed because it was never there. Wynne demanded the Justice League give "my ring" back in an earlier chapter.
Is quite possible that without using the ring regularly and with the ring having zero power the brainwashing didn't stick.
I guess Hinon never thought whoever got the ring wouldn't use it regularly or not steal a battery for it.